﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace AdvancedCSharpFeatures
{
    public static class StringExtensions
    {
        public static StringBuilder Substring(this StringBuilder sb, int index, int lenght)
        {
            return new StringBuilder(sb.ToString().Substring(index, lenght));
        }
    }
}
